The class statistics section of the WCAT log displays retrieval rate data for pages retrieved by the clients. Data is separated into different tables by page class. You can use the data to compare the performance of the server for different classes of Web pages.
Class is the category WCAT uses to group together similar Web pages, such as static pages or CGI requests. The WCAT controller directs clients to request pages of a given class at a given relative frequency, but it lets the clients select which pages in a class to request. The script file for a WCAT test specifies the pages assigned to each class and gives the class an identifier number. It is useful to consult a test’s script file when interpreting the class statistics section of that test’s log.
The class statistics consist of a series of three-row tables. Each set of three rows constitutes the data for one class. The following table lists and describes the test criteria in the class table.
Table 7 Class Table Test Criteria
| Test criterion (row) | Description |
| Fetched | The number of pages the clients received from the server. The Fetched row is the same as the Pages Read row in the results table. |
| Errored | The number of requests for pages that could not be satisfied because the server could not find the requested page. The Errored row is the same as the Read Errors row in the results table. |
| Distrib | The distribution percentage for the class. The number is expressed as 100 times the percentage. For example, 906 indicates that this class was requested 9.06 percent of the time. |
There are no column headings in the class statistics table. The first column of the table displays the class identifier of the class measured; the remaining columns are identical to those for the results table.
The following example shows the first two tables in the class statistics section of 1ktest01.log. The tables shown are for classes 1 and 2. The column headings in the following example were added for reference.
Per Class Statistics:Class ID
|
Test Criteria
|
Summary
|
Rate
|
Client 1
|
| 1 | Fetched | 1567 | 5.22 | 1567 |
| 1 | Errored | 0 | 0.00 | 0 |
| 1 | distrib | 906 | 3.02 | 906 |
| 2 | Fetched | 1408 | 4.69 | 1408 |
| 2 | Errored | 0 | 0.00 | 0 |
| 2 | distrib | 814 | 2.71 | 814 |